#!/usr/sbin/dtrace -qs

#pragma D option dynvarsize=4m
#pragma D option cleanrate=251Hz

enum tx_event {
	DIRECT = 1,
	INDIRECT = 2
};

dtrace:::BEGIN
{
	printf("Ready.  Press ^C to stop...");
}

fbt:if_cxgb:cxgb_transmit:entry
{
	self->caller = DIRECT;
	self->n_encap = 0;
}
fbt:if_cxgb:cxgb_start_locked:entry
/self->caller == 0/
{
	self->caller = INDIRECT;
	self->n_encap = 0;
}

fbt:if_cxgb:t3_encap:entry
{
	self->n_encap++;
}

fbt:if_cxgb:cxgb_start_locked:return,
fbt:if_cxgb:cxgb_transmit:return
/self->caller != 0 && self->n_encap/
{
	this->p1 = self->caller == DIRECT ? "if_transmit" : "timeout/wdog";

	@t3encap[this->p1] = quantize(self->n_encap);
}

fbt:if_cxgb:cxgb_start_locked:return,
fbt:if_cxgb:cxgb_transmit:return
/self->caller != 0/
{
	this->p1 = self->caller == DIRECT ? "if_transmit" : "timeout/wdog";
	this->p2 = self->n_encap ? "tx" : "--";

	@txevents[this->p1, this->p2] = count();

	self->caller = 0;
	self->n_encap = 0;
}

dtrace:::END
{
	printa("%s\t[%s]:\t%@u\n", @txevents);
	printa("%s -> t3_encap: %@u\n", @t3encap);
}